.header{
    width: 100%;
    min-width:1200px;
    background-color: #fff;
    padding: 0 20px;
    box-sizing: border-box;
}
.header-heart{
    min-width: 1200px;
    max-width: 1720px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 150px   
}
.nav .top{
    text-align: right;
    margin-right:15px;
    margin-bottom: 10px;
    font-size: 14px;
    color: #ababab;
}
.nav{
    display: flex;
    flex-direction: column;
}
.nav .bottom .bottom-ul{
    display: flex;
    gap: 40px;
}
.nav .bottom .bottom-ul .bottom-ul-li{
    position: relative;
}
.nav .bottom .bottom-ul .bottom-ul-li a{
       font-size: 18px;
       padding: 20px 15px;
}
.nav .bottom .bottom-ul .bottom-ul-li::after{
       content: '';
       position: absolute;
       width:100%;
       height: 5px;
       background: linear-gradient(to right,#ff7800,#ffd400);
       bottom:-15px;
       left: 50%;
       margin-left:-50%;
       border-radius: 10px;
       transform: scale(0);
       transition: 0.3s;
}
.nav .bottom .bottom-ul .bottom-ul-li:hover::after{
      transform: scale(1);
}
.nav .bottom .bottom-ul-li:nth-child(7)::after{
    transform: scale(1);
}